UPDATED with great comments, to which I have added my editorial musings...
...and the quest is to find a source for reloading data to push 9mm Luger to +P+ pressure for a carbine.
It seems that the lawyers have scared off all the folks who have modified race guns and shoot IDPA Major Power Nine, and they won't publish their data. My carbine is a KelTec Sub Rifle 2000, with aftermarket spring & buffer block. It's fully-supported chamber is fine for +P+. I've been shooting NATO in it, and it loves that ammo, which is +P, sort-of.
To aid in the quest, I've laid in some Ramshot Silhouette powder and some Hodgdon HS-6 powder. I have some Xtreme Bullets 124gr CPRN and some once-fired brass, mostly Federal. All I need now is the data.
I intend to start by duping the NATO load. Father Frog's page shows me that. After that, my development will trend towards max loads of slower powders, since I have a long barrel to accelerate those FMJ pills with. I'm thinking of IMR 4227, but I only have room for 7 grains or so.
I wish I could find out what the Canadian Defense Ministry used for powder in their famous "Canadian Parabellum" loading, a HOT SMG round. They haven't made any since the Fifties when the West went to NATO, then later to STANAG standard. Supposedly, that round would wreck anything except a Sten or a FN Hi-power. It also used a lighter bullet to give more room for powder.
The one daredevil I found data from said that he loads up to 7.2-gr of HS-6 behind a 115 FMJ and barely makes 1350fps in a 4.9" racegun barrel. That gives him his Major Nine Power Factor, just barely. That's 450 #/' ME. That load should make 465 #/' ME. In a carbine, that should give 1750 fps and 782 #/' ME. Hornady's tables say that makes the carbine a useful battle tool* out to 200 yards or so. Pressure is a guess, but likely to be 37KCUP or under. Proof is 42KCUP.
For comparison, the above figures resemble what a normal .357 Remington Magnum 125-gr JHP will do out of a lever rifle.
Interesting quest. Right on the edge. Yes. Herr Luger would be impressed.
* See table below
|9mm Major Power||115 gr.||0.5 B.C.|
|Come UP in MOA||0||1.2||6.8||13.6||21.5||30.4|
|Come UP in Mils||0||0.4||2||4||6.3||8.8|